Pointing to a photograph Yuvraj says, “He is the only brother of the only daughter of my sister’s maternal grandmother.” Pointing to another photograph Sourav says, “he is the only brother of the only daughter of my sister’s maternal grandmother.” If among the two photographs,one was either of Sourav or Yuvraj, and the photograph, towards which Yuvraj was pointing,was not of Sourav, then how is Yuvraj related to Sourav?